Simulation based improved analysis of BLDC motor by coupling FEM motor model with various switching patterns

Simulation based research have been widely used for analyzing characteristics of motors. In this research, a Finite Elements Method (FEM) model of an 8 pole 12 slot Brushless DC (BLDC) motor and a 3 phase BLDC motor controller are coupled together so that we can simultaneously determine the mechanical and electrical characteristics of the BLDC motor and achieve more reliable analysis results. At the analysis, various switching patterns of the high-side, half-going and both-end switching methods were simulated under 0.5 Nm load to determine and compare their effect on the BLDC motors, and determined that the 3^rd switching pattern which has switching at both high and low sides before and after the high-side switching period is the most effective.